plugins/languages: move to by-name

plugins/by-name/helm/default.nix

@@ -0,0 +1,27 @@
+{
+  lib,
+  helpers,
+  config,
+  pkgs,
+  ...
+}:
+with lib;
+let
+  cfg = config.plugins.helm;
+in
+{
+  meta.maintainers = [ maintainers.GaetanLepage ];
+
+  options.plugins.helm = {
+    enable = mkEnableOption "vim-helm";
+
+    package = lib.mkPackageOption pkgs "vim-helm" {
+      default = [
+        "vimPlugins"
+        "vim-helm"
+      ];
+    };
+  };
+
+  config = mkIf cfg.enable { extraPlugins = [ cfg.package ]; };
+}